Find flights
When to book
Airlines
FAQs

Cheap flights from Ireland to San Juan from £451

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SJU
12 Jun — 19 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to San Juan

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to San Juan
Explore the most affordable flight options available from Ireland to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2026.

Thu 25/611:30
DUB
-
SJU
1 stop13h 24m
JetBlue
Thu 2/715:24
SJU
-
DUB
1 stop12h 36m
JetBlue
Deal found 11/5£475
Mon 15/611:10
DUB
-
SJU
2 stops17h 33m
KLM
Sun 28/612:54
SJU
-
DUB
1 stop14h 51m
KLM
Deal found 9/5£541
Thu 18/611:30
DUB
-
SJU
1 stop13h 24m
JetBlue
Thu 2/718:21
SJU
-
DUB
1 stop33h 39m
JetBlue
Deal found 13/5£547
Sat 5/911:30
DUB
-
SJU
1 stop13h 50m
JetBlue
Sun 6/920:50
SJU
-
DUB
1 stop30h 30m
JetBlue
Deal found 10/5£577
Tue 1/908:35
DUB
-
SJU
2 stops18h 49m
British Airways
Mon 7/906:51
SJU
-
DUB
1 stop18h 39m
British Airways
Deal found 8/5£587
Thu 18/611:10
DUB
-
SJU
2 stops17h 33m
KLM
Thu 2/714:14
SJU
-
DUB
1 stop14h 46m
KLM
Deal found 13/5£599
Tue 1/911:30
DUB
-
SJU
1 stop16h 09m
JetBlue
Mon 7/908:30
SJU
-
DUB
1 stop18h 50m
JetBlue
Deal found 8/5£603
Thu 28/510:00
DUB
-
SJU
2 stops17h 17m
Delta
Mon 1/607:30
SJU
-
DUB
2 stops20h 45m
Delta
Deal found 12/5£605
Mon 7/909:50
DUB
-
SJU
1 stop14h 00m
Multiple Airlines
Sun 13/914:25
SJU
-
DUB
2 stops18h 05m
Multiple Airlines
Deal found 9/5£616

Find flight deals from Ireland to San Juan

Keep the following information in mind while searching for Ireland to San Juan flight deals. Data was last updated 13 May 2026.

Round-trip from

£475

One-way from

£451

Popular in

July

Cheapest in

May

Average price

£470
JetBlue
  • JetBlue
  • 25/6-2/7
  • 2 total stops
  • 26h 00m total
  • Ireland to San Juan
Search Deals
JetBlue
  • JetBlue
  • 20/9
  • 1 total stop
  • 18h 18m total
  • Ireland to San Juan
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 May 2026.
Use the filters below to find and compare flights from Ireland to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Mon 15/6

11:10-23:43

2 stops17h 33m

San Juan Luis Munoz Marin Intl

Sun 28/6

12:54-08:45

1 stop14h 51m

£541

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 18/6

11:30-19:54

1 stop13h 24m

San Juan Luis Munoz Marin Intl

Thu 2/7

18:21-09:00

1 stop33h 39m

£547

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Sat 5/9

11:30-20:20

1 stop13h 50m

San Juan Luis Munoz Marin Intl

Sun 6/9

20:50-08:20

1 stop30h 30m

£577

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Tue 1/9

08:35-22:24

2 stops18h 49m

San Juan Luis Munoz Marin Intl

Mon 7/9

06:51-06:30

1 stop18h 39m

£587

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 18/6

11:10-23:43

2 stops17h 33m

San Juan Luis Munoz Marin Intl

Thu 2/7

14:14-10:00

1 stop14h 46m

£599

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Tue 1/9

11:30-22:39

1 stop16h 09m

San Juan Luis Munoz Marin Intl

Mon 7/9

08:30-08:20

1 stop18h 50m

£603

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 28/5

10:00-22:17

2 stops17h 17m

San Juan Luis Munoz Marin Intl

Mon 1/6

07:30-09:15

2 stops20h 45m

£605
Fastest return journey

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Mon 7/9

09:50-18:50

1 stop14h 00m

San Juan Luis Munoz Marin Intl

Sun 13/9

14:25-13:30

2 stops18h 05m

£616

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 25/6

11:00-20:43

1 stop14h 43m

San Juan Luis Munoz Marin Intl

Thu 2/7

07:30-10:00

2 stops21h 30m

£633

DublinSan Juan

DUB - SJU

DUBSJU

Dublin

Thu 18/6

08:35-21:58

2 stops18h 23m

San Juan Luis Munoz Marin Intl

Thu 2/7

07:00-06:30

1 stop18h 30m

£634

Flights are sorted by cheapest return flights first.

Deals found on 11/5

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Ireland to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Ireland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to San Juan

What is the cheapest month to book a flight from Ireland to San Juan?

Currently, May is the cheapest month in which you can book a flight from Ireland to San Juan (average of £377). Flying from Ireland to San Juan in September is currently the most expensive (average of £587). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated 13 May 2026.
Get a feel of what it's like to fly with American Airlines from Ireland to San Juan by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,662 reviews
Check prices

Food

6.4

Crew

7.9

Overall

7.1

Boarding

7.5

Entertainment

6.9

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,May 2025

PHL - LHR

A very good flight. They were not as accommodating in relation to the food and beverage options. Last year on the same flight to London, they offered an additional glass of wine beer or vodka. They also offered extra snacks and were constantly checking on us. This flight, they barely acknowledged our presence. They were not rude just not sociable or readily accessible.
American Airlines
7.1
Good
11,662 reviews
American Airlines
7.1
Good
11,662 reviews
Check prices

Food

6.4

Crew

7.9

Overall

7.1

Boarding

7.5

Entertainment

6.9

Comfort

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,May 2025

PHL - LHR

A very good flight. They were not as accommodating in relation to the food and beverage options. Last year on the same flight to London, they offered an additional glass of wine beer or vodka. They also offered extra snacks and were constantly checking on us. This flight, they barely acknowledged our presence. They were not rude just not sociable or readily accessible.

Related info for your journey

Find useful and relevant information for your journey from Ireland to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ireland to San Juan?

    Departing from Ireland to San Juan will take you 13h 24m. Airlines will cover a distance of 3963 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Ireland to San Juan that include hotel bookings?

    Yes. In addition to deals on Ireland to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to San Juan.

  • Can I find deals for business class flights from Ireland to San Juan?

    Yes. Cheapflights offers flight deals from Ireland to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to San Juan?

    Currently, May is the cheapest month in which you can book a flight from Ireland to San Juan (average of £377). Flying from Ireland to San Juan in September is currently the most expensive (average of £587). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ireland to San Juan

Discover the top airline that operate flights from Ireland to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 May 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£573Average£689FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to San Juan?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ireland to San Juan. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ireland to San Juan?

Cheapflights simply makes it quick and affordable to book flights from Ireland to San Juan by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ireland to San Juan with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ireland to San Juan flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ireland to San Juan become cheaper?

Yes, Cheapflights offers price alerts on Ireland to San Juan flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.